;用int 7ch 制作loop s 功能，测试程序
assume cs:codesg

codesg segment
	start:mov ax,0b800h
	mov es,ax
	mov di,160*12
	
	mov bx,offset s - offset send ;bx = FFF7
	mov cx,80
	
	s:mov byte ptr es:[di],'X'
	add di,2
	int 7ch
	send:nop
	
	mov ax,4c00h
	int 21h
codesg ends

end start